{"id":537,"date":"2019-09-15T09:36:19","date_gmt":"2019-09-15T08:36:19","guid":{"rendered":"https:\/\/hubert-info.com\/cms\/?p=537"},"modified":"2019-09-15T17:33:04","modified_gmt":"2019-09-15T16:33:04","slug":"magic-sysrq-key","status":"publish","type":"post","link":"https:\/\/hubert-info.com\/cms\/magic-sysrq-key\/","title":{"rendered":"Magic SysRq Key"},"content":{"rendered":"<p>La plupart des commandes cit\u00e9es ci-dessous utilisent la touche<br \/>\n\u00ab Magic SysRq Key \u00bb.<\/p>\n<p>C&rsquo;est la touche \u00ab Impr \u00e9cran \u00bb du clavier.<\/p>\n<h3 class=\"heading-font\">Activation \/ D\u00e9sactivation de SysRq<\/h3>\n<p>Il faudra absolument que le noyau de votre Linux soit compil\u00e9 avec<br \/>\nl\u2019option Magic SysRq Key pour que cette touche fonctionne.<\/p>\n<p>La plupart des distributions r\u00e9centes l&rsquo;inclut aujourd\u2019hui.<\/p>\n<p>Pour v\u00e9rifier l\u2019activation de cette touche, on effectue la commande suivante :<\/p>\n<blockquote><p># cat \/proc\/sys\/kernel\/sysrq<\/p>\n<p>0<\/p><\/blockquote>\n<p>Le z\u00e9ro signifie que cette derni\u00e8re n\u2019a pas \u00e9t\u00e9 activ\u00e9e.<\/p>\n<p>Pour changer cette valeur, on effectue la commande suivante :<\/p>\n<blockquote><p>echo \u00ab 1\u2033 &gt; \/proc\/sys\/kernel\/sysrq<\/p><\/blockquote>\n<p>Pour activer la touche Magic SysRq Key au d\u00e9marrage de la machine, \u00e9diter le fichier \/etc\/sysctl.conf et<br \/>\nmettre l\u2019option sysrq \u00e0 1 :<\/p>\n<blockquote><p>kernel.sysrq = 1<\/p><\/blockquote>\n<h3 class=\"heading-font\">Les commandes<\/h3>\n<ul>\n<li>Alt + SysRq + r : met le clavier en mode \u2018raw\u2019. Ceci est pratique<br \/>\nnotamment lorsque le clavier et la souris sont compl\u00e8tement bloqu\u00e9s. En<br \/>\npassant sur ce mode, on peut de nouveau utiliser les touches pour saisir<br \/>\ndes commandes.<\/li>\n<li>Ctrl + Alt + F1 \u00e0 F6 : permet de naviguer \u00e0 travers les consoles en mode texte (appel\u00e9es aussi tty)<\/li>\n<li>Ctrl + Alt + F7 : permet de retourner au mode graphique.<\/li>\n<li>Ctrl + Alt + Backspace : arr\u00eate l\u2019interface graphique, on pourra la relancer ensuite avec la commande startx<\/li>\n<li>Alt + SysRq + s : \u00e9crit toutes les donn\u00e9es en cours sur le disque dur afin d\u2019\u00e9viter les pertes ou les corruptions de fichiers<\/li>\n<li>Alt + SysRq + u : permet de remonter tous les syst\u00e8mes de fichiers en lecture seule pour \u00e9viter la corruption de donn\u00e9es<\/li>\n<li>Alt + SysRq + e : tue tous les processus normalement (le processus init n\u2019est pas concern\u00e9)<\/li>\n<li>Alt + SysRq + i : force le kill de tous les processus (le processus init n\u2019est pas concern\u00e9)<\/li>\n<li>Alt + SysRq + l : m\u00eame chose que la pr\u00e9c\u00e9dente, sauf que le processus init est concern\u00e9 ici<\/li>\n<li>Alt + SysRq + b : red\u00e9marre le syst\u00e8me<\/li>\n<li>Alt + SysRq + o : arr\u00eate le syst\u00e8me<\/li>\n<\/ul>\n<p><b>Note<\/b> : dans la plupart des distributions, l\u2019utilisation de la<br \/>\ntouche SysRq n\u2019est pas activ\u00e9e par d\u00e9faut pour des raisons de s\u00e9curit\u00e9.<br \/>\nEn effet, quelqu\u2019un qui aurait un acc\u00e8s physique \u00e0 la machine, pourrait<br \/>\nfacilement la red\u00e9marrer via une combinaison de touches et compromettre<br \/>\ncette derni\u00e8re ensuite.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La plupart des commandes cit\u00e9es ci-dessous utilisent la touche \u00ab Magic SysRq Key \u00bb. C&rsquo;est la touche \u00ab Impr \u00e9cran \u00bb du clavier. Activation \/ D\u00e9sactivation de SysRq Il faudra absolument que le noyau de votre Linux soit compil\u00e9 avec l\u2019option Magic SysRq Key pour que cette touche fonctionne. La&#8230; <a class=\"continue-reading-link\" href=\"https:\/\/hubert-info.com\/cms\/magic-sysrq-key\/\"> Continue reading <span class=\"meta-nav\">&rarr; <\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,33],"tags":[108,107,106],"class_list":["post-537","post","type-post","status-publish","format-standard","hentry","category-astuce","category-linux-mint","tag-commande","tag-linux","tag-magic-sysrq-key"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Magic SysRq Key - Hubert Informatique<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hubert-info.com\/cms\/magic-sysrq-key\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Magic SysRq Key - Hubert Informatique\" \/>\n<meta property=\"og:description\" content=\"La plupart des commandes cit\u00e9es ci-dessous utilisent la touche \u00ab Magic SysRq Key \u00bb. C&rsquo;est la touche \u00ab Impr \u00e9cran \u00bb du clavier. Activation \/ D\u00e9sactivation de SysRq Il faudra absolument que le noyau de votre Linux soit compil\u00e9 avec l\u2019option Magic SysRq Key pour que cette touche fonctionne. La... 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C&rsquo;est la touche \u00ab Impr \u00e9cran \u00bb du clavier. Activation \/ D\u00e9sactivation de SysRq Il faudra absolument que le noyau de votre Linux soit compil\u00e9 avec l\u2019option Magic SysRq Key pour que cette touche fonctionne. La... 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